#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>

#define FIFO_NAME "/tmp/my_fifo"
#define BUFFER_SIZE PIPE_BUF
#define TEN_MEG (1024*1024*10)

int main()
{
	int pipe_fd;
	int res;
	int open_mode = O_WRONLY;
	int bytes_send = 0;
	char buffer[BUFFER_SIZE];

	if(access(FIFO_NAME,F_OK) == -1){
		res = mkfifo(FIFO_NAME, 0777);
		if(res != 0){
			fprintf(stderr, "could not create fifo %s \n",
				FIFO_NAME);
			exit(EXIT_FAILURE);
		}
	}
	
	printf("Process %d opening FIFO O_WRONLY\n", getpid());
	pipe_fd = open(FIFO_NAME, open_mode);
	printf("process %d result %d\n", getpid(), pipe_fd);

	if(pipe_fd != -1){
		while(bytes_send < TEN_MEG){
			res = write(pipe_fd, buffer, BUFFER_SIZE);
			if(res == -1){
				fprintf(stderr, "Write error on pipe\n");
				exit(EXIT_FAILURE);
			}
			bytes_send += res;
		}
		close(pipe_fd);
	}else{
		exit(EXIT_FAILURE);
	}
		
	printf("Process %d finished\n",getpid());
	exit(EXIT_SUCCESS);
}



